Ophthalmic lens material

ABSTRACT

An ophthalmic lens material includes dopamine methacrylamide, a hydrophilic monomer, a cross-linking agent, and a photoinitiator. The dopamine methacrylamide has a mass percentage of about 0.5% to about 10% of a total mass of the ophthalmic lens material. The hydrophilic monomer has a mass percentage of about 88.95% to about 99.494% of a total mass of the ophthalmic lens material. The cross-linking agent has a mass percentage of about 0.001% to about 1% of a total mass of the ophthalmic lens material. The photoinitiator has a mass percentage of about 0.005% to about 0.05% of a total mass of the ophthalmic lens material.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a divisional application of patent application Ser. No.14/941,083, filed on Nov. 13, 2015, entitled “OPHTHALMIC LENS MATERIAL,OPHTHALMIC LENS, AND METHOD FOR MAKING THE SAME”, assigned to the sameassignee, which is based on and claims priority to Taiwan PatentApplication No. 104136236 filed on Nov. 3, 2015, the contents of whichare incorporated by reference herein.

FIELD

The subject matter herein generally relates to an ophthalmic lensmaterial.

BACKGROUND

Contact lenses are commonly worn by users to correct vision, or forcosmetic or therapeutic reasons. Usually, antibacterial agents aredisposed on the surface of a contact lens, to prevent a user fromsuffering from eye damage such as acute red eye or microbial keratitis.

BRIEF DESCRIPTION OF THE DRAWINGS

Implementations of the present technology will now be described, by wayof example only, with reference to the attached figures.

The FIGURE is a flowchart of an embodiment of a method for making anophthalmic lens according to the present disclosure.

DETAILED DESCRIPTION

It will be appreciated that for simplicity and clarity of illustration,where appropriate, reference numerals have been repeated among thedifferent figures to indicate corresponding or analogous elements. Inaddition, numerous specific details are set forth in order to provide athorough understanding of the embodiments described herein. However, itwill be understood by those of ordinary skill in the art that theembodiments described herein can be practiced without these specificdetails. In other instances, methods, procedures, and components havenot been described in detail so as not to obscure the related relevantfeature being described. Also, the description is not to be consideredas limiting the scope of the embodiments described herein. The drawingsare not necessarily to scale and the proportions of certain parts may beexaggerated to better illustrate details and features of the presentdisclosure.

The term “comprising,” when utilized, means “including, but notnecessarily limited to”; it specifically indicates open-ended inclusionor membership in the so-described combination, group, series and thelike.

The FIGURE illustrates a flowchart of a method for making an ophthalmiclens in accordance with an exemplary embodiment. The exemplary method isprovided by way of example, as there are a variety of ways to carry outthe method. Each block shown in the FIGURE represents one or moreprocesses, methods or subroutines, carried out in the exemplary method.Furthermore, the illustrated order of blocks is by example only and theorder of the blocks can change. Additional blocks may be added or fewerblocks may be utilized, without departing from this disclosure. Theexemplary method can begin at block 101.

At block 101, a mixture is formed by mixing dopamine methacrylamide, ahydrophilic monomer, a cross-linking agent, and a photoinitiator,wherein the dopamine methacrylamide has the chemical formula:

The dopamine methacrylamide has a mass percentage of about 0.5% to about10% of a total mass of the mixture. The hydrophilic monomer has a masspercentage of about 88.95% to about 99.494% of a total mass of themixture. The cross-linking agent has a mass percentage of about 0.001%to about 1% of a total mass of the mixture. The photoinitiator has amass percentage of about 0.005% to about 0.05% of a total mass of themixture.

The hydrophilic monomer may be selected from a group consisting ofmethylacrylic acid compounds and acrylic compounds, or any combinationthereof, such as 2-hydroxyethyl methacrylate (HEMA), methyl methacrylate(MMA), poly(dimethylsiloxane),3-methacryloxypropyletris(trimethylsiloxy)silane, N-vinyl pyrrolidone(NVP), glycidyl methacrylate, N,N-dimethylacrylamide, and methylacrylate (MA), or any combination thereof.

The cross-linking agent may be selected from a group consisting ofethylene glycol dimethacrylate (EGDMA) and trimethylolpropanetrimethacrylate (TMPTMA), or any combination thereof. The photoinitiatormay be available commercially from Chemical Industries Basel (CIBA)Corporation as a clear liquid under the trade name “Irgacure-1173”.

At block 102, the mixture is fed into a mold and is exposed toultraviolet radiation, to cause the dopamine methacrylamide, thehydrophilic monomer, the photoinitiator, and the cross-linking agent inthe mixture to undergo a polymerization reaction, thereby forming theophthalmic lens. A time period for the ultraviolet irradiation is fromabout 10 min to about 30 min.

At block 103, the ophthalmic lens is immersed in an antibacterialsolution containing an antibacterial agent for a preset period of time,allowing the antibacterial agent to be anchored to the catechol groupsof the dopamine methacrylamide. As such, the antibacterial agent is noteasily washed away by tears, thereby allowing the ophthalmic lens tomaintain an antibacterial effect. When the antibacterial solutioncomprises metal ions (such as silver ions) functioning as theantibacterial agent, the catechol groups are able to reduce the metalions to be nano metal particles which are anchored to the catecholgroups. When the antibacterial agent comprises thiol groups or aminegroups functioning as the antibacterial agent, the catechol groups reactwith the thiol groups or the amine groups to form covalent bonds,thereby anchoring the antibacterial agent to the dopaminemethacrylamide. In other embodiments, the block 103 can be omitted fromthe method for making an ophthalmic lens, and such a step can beperformed before wearing the ophthalmic lens.

Example 1

A mixture is formed by mixing dopamine methacrylamide, 2-hydroxyethylmethacrylate, poly(dimethylsiloxane), ethylene glycol dimethacrylate,and Irgacure-1173. The dopamine methacrylamide has a mass percentage of1% of a total mass of the mixture. The 2-hydroxyethyl methacrylate has amass percentage of 60% of a total mass of the mixture. Thepoly(dimethylsiloxane) has a mass percentage of 38.94% of a total massof the mixture. The ethylene glycol dimethacrylate has a mass percentageof 0.05% of a total mass of the mixture. Irgacure-1173 has a masspercentage of 0.01% of a total mass of the mixture. The mixture is fedinto a mold and is exposed to ultraviolet radiation for 25 min, therebyforming an ophthalmic lens.

Example 2

A mixture is formed by mixing dopamine methacrylamide, 2-hydroxyethylmethacrylate, 3-methacryloxypropyletris (trimethylsiloxy) methyl siloxy)silane, ethylene glycol dimethacrylate, and Irgacure-1173. The dopaminemethacrylamide has a mass percentage of 10% of a total mass of themixture. The 2-hydroxyethyl methacrylate has a mass percentage of 45% ofa total mass of the mixture. The 3-methacryloxypropyletris(trimethylsiloxy) silane has a mass percentage of 43.98% of a total massof the mixture. The ethylene glycol dimethacrylate has a mass percentageof 1% of a total mass of the mixture. Irgacure-1173 has a masspercentage of 0.02% of a total mass of the mixture. The mixture is fedinto a mold and is exposed to ultraviolet radiation for 30 min, therebyforming an ophthalmic lens.

Example 3

A mixture was formed by mixing dopamine methacrylamide, methylmethacrylate, 3-methacryloxypropyletris (trimethylsiloxy) methyl siloxy)silane, ethylene glycol dimethacrylate, and Irgacure-1173. The dopaminemethacrylamide has a mass percentage of 5% of a total mass of themixture. The methyl methacrylate has a mass percentage of 30% of a totalmass of the mixture. The 3-methacryloxypropyletris (trimethylsiloxy)silane has a mass percentage of 64.94% of a total mass of the mixture.The ethylene glycol dimethacrylate has a mass percentage of 0.05% of atotal mass of the mixture. Irgacure-1173 has a mass percentage of 0.01%of a total mass of the mixture. The mixture was fed into a mold and wasexposed to ultraviolet radiation for 28 min, thereby forming anophthalmic lens.

Example 4

The ophthalmic lens obtained from the example 1 was immersed in a silvernitrate solution having a concentration of 1 mmol/L for 12 hours,thereby causing silver nano particles to be anchored to the catecholgroups of the dopamine methacrylamide comprised in the ophthalmic lens.

Example 5

The ophthalmic lens obtained from the example 2 was immersed in a silvernitrate solution having a concentration of 15 mmol/L for 16 hours,thereby causing silver nano particles to be anchored to the catecholgroups of the dopamine methacrylamide comprised in the ophthalmic lens.

Example 6

The ophthalmic lens obtained from the example 3 was immersed in aantibacterial peptide solution for 20 hours, thereby causingantibacterial peptides comprised in the antibacterial peptide solutionto be anchored to the catechol groups of the dopamine methacrylamidecomprised in the ophthalmic lens.

An ophthalmic lens material used in the method to make the ophthalmiclens is provided according the present disclosure. The ophthalmic lensmaterial comprises dopamine methacrylamide, a hydrophilic monomer, across-linking agent, and a photoinitiator. The dopamine methacrylamidehas a mass percentage of about 0.5% to about 10% of a total mass of theophthalmic lens material. The hydrophilic monomer has a mass percentageof about 88.95% to about 99.494% of a total mass of the ophthalmic lensmaterial. The cross-linking agent has a mass percentage of about 0.001%to about 1% of a total mass of the ophthalmic lens material. Thephotoinitiator has a mass percentage of about 0.005% to about 0.05% of atotal mass of the ophthalmic lens material. When the ophthalmic lensmaterial is exposed to ultraviolet radiation, the dopaminemethacrylamide, the hydrophilic monomer, the photoinitiator, and thecross-linking agent undergo a polymerization reaction, thereby formingan ophthalmic lens.

An ophthalmic lens made by the method is provided according the presentdisclosure. The ophthalmic lens is formed by exposing a mixture of thedopamine methacrylamide, the hydrophilic monomer, the photoinitiator,and the cross-linking agent to ultraviolet radiation to cause themixture to undergo a polymerization reaction. The ophthalmic lens can bea contact lens or an intraocular lens. The dopamine methacrylamide has amass percentage of about 0.5% to about 10% of a total mass of thedopamine methacrylamide, the hydrophilic monomer, the cross-linkingagent, and the photoinitiator. The hydrophilic monomer has a masspercentage of about 88.95% to about 99.494% of a total mass of thedopamine methacrylamide, the hydrophilic monomer, the cross-linkingagent, and the photoinitiator. The cross-linking agent has a masspercentage of about 0.001% to about 1% of a total mass of the dopaminemethacrylamide, the hydrophilic monomer, the cross-linking agent, andthe photoinitiator. The photoinitiator has a mass percentage of about0.005% to about 0.05% of a total mass of the dopamine methacrylamide,the hydrophilic monomer, the cross-linking agent, and thephotoinitiator.

It is to be understood, even though information and advantages of thepresent embodiments have been set forth in the foregoing description,together with details of the structures and functions of the presentembodiments, the disclosure is illustrative only; changes may be made indetail, especially in matters of shape, size, and arrangement of partswithin the principles of the present embodiments to the full extentindicated by the plain meaning of the terms in which the appended claimsare expressed.

What is claimed is:
 1. An ophthalmic lens material comprising: dopaminemethacrylamide, a hydrophilic monomer, a cross-linking agent, and aphotoinitiator; wherein the dopamine methacrylamide has a masspercentage of about 0.5% to about 10% of a total mass of the ophthalmiclens material, the hydrophilic monomer has a mass percentage of about88.95% to about 99.494% of a total mass of the ophthalmic lens material,the cross-linking agent has a mass percentage of about 0.001% to about1% of a total mass of the ophthalmic lens material, the photoinitiatorhas a mass percentage of about 0.005% to about 0.05% of a total mass ofthe ophthalmic lens material.
 2. The ophthalmic lens material of claim1, wherein the hydrophilic monomer is selected from a group consistingof methylacrylic acid compounds and acrylic compounds, or anycombination thereof.
 3. The ophthalmic lens material of claim 1, whereinthe hydrophilic monomer is selected from a group consisting of2-hydroxyethyl methacrylate, methyl methacrylate,poly(dimethylsiloxane),3-methacryloxypropyletris(trimethylsiloxy)silane, N-vinyl pyrrolidone,glycidyl methacrylate, N,N-dimethylacrylamide, and methyl acrylate, orany combination thereof.